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SHARE-BASED COMPENSATION - Stock Units and Director Stock Grants (Details) - Stock and stock units - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Changes during the period:    
Stock and stock units, beginning of period (in shares) 804,000  
Granted (in shares) 219,000 0
Vested and settled (in shares) 0  
Forfeited and cancelled (in shares) (39,000)  
Stock and stock units, end of period (in shares) 984,000 804,000
Changes during the period:    
Stock and stock units, beginning of period (in dollars per share) $ 7.27  
Granted (in dollars per share) 1.64  
Vested and settled (in dollars per share) 0  
Forfeited and cancelled (in dollars per share) 6.28  
Stock and stock units, end of period (in dollars per share) $ 6.05 $ 7.27